math help

What is 53/9 + 6/8?

What is 53/9 + 6/8?

This is how to add

53
9
+
6
8

Step 1

We can't add two fractions with different denominators (the bottom number). So you need to get a common denominator - both bottom numbers need to match. To do this, you'll multiply the denominators times each other... but the numerators have to change, too. They get multiplied by the other term's denominator.

So we multiply 53 by 8, and get 424, then we multiply 9 by 8 and get 72.

53/9 times 8

Do the same for the second term. We multiply 6 by 9, and get 54, then multiply 9 by 8 and get 72.

6/8 times 9

So now our fractions look like this:

424
72
+
54
72

Step 2

Since our denominators match, we can add the numerators.

424 + 54 = 478

Now we have an answer.

478
72

Step 3

Last of all, we need to simplify the fraction, if possible. Can it be reduced to a simpler fraction?

To find out, we try dividing it by 2...

Are both the numerator and the denominator evenly divisible by 2? Yes! So we reduce it:

478
72
÷ 2 =
239
36

Now, try the same number again.

Nope. Try the next prime number, 3...

Nope. Try the next prime number, 5...

Nope. Try the next prime number, 7...

Nope. Try the next prime number, 11...

Nope. Try the next prime number, 13...

Nope. Try the next prime number, 17...

Nope. Try the next prime number, 19...

Nope. Try the next prime number, 23...

Nope. Try the next prime number, 29...

Nope. Try the next prime number, 31...

Nope. Try the next prime number, 37...

No good. 37 is larger than 36. So we're done reducing.

Congratulations! Here's your final answer to 53/9 + 6/8

53
9
+
6
8
=
239
36
© 2014 Randy Tayler